It’s clearly not supposed to push the nozzle into the bed when doing the calibration. They have chosen the proximity sensor for a reason :). Just move the sensor down a little bit as you’ve already seen over here: Calibration pushing deep into buildplate
I’m still on my first print and have no issues with freezing. Could you upload your model so someone else is able to test? There are also online-services which do repair 3D models. Just google for them, there are a few out there. The model may be corrupt which could produce bad g-code.
Hope this helps…